The complication in La Vergne isn't old, worn-out parts failing from age - it's original parts that were never serviced hitting their first failure all at once. A house built in 2000 that's never had a spring break is a house where the owner has no idea what size spring, what drum, or what cable gauge is actually up there. We show up and have to identify the setup before we can fix it, which takes a few extra minutes a repeat customer's job doesn't.
Cold weather in this part of Tennessee isn't brutal, but it's enough to stiffen grease and make a spring that's been fine for twenty years finally let go on a cold morning. That's usually the trigger, not a single dramatic event. The other wrinkle: if the opener is also original to the house, a spring failure sometimes takes the opener's gears with it, since the motor was straining against unequal spring tension before it broke. We check both, not just the spring.